Hello 
Have you adjusted anything yet …
The ‘Charged Voltage’ voltage of the shunt is not correct … The voltage that the battery has when it is charged should be entered here.
That’s why the shunt is already at 100% and will certainly also inform the Mppt of this via the SmartNetwork …
Hey you🙂 I have followed the settings in the smart shut manual for the lithium battery. The only thing that I couldn’t change was the tail current. I don’t know how to do that.
When the battery has reached the required charging voltage and must have held it for a while for balancing to take place, the ‘tail current’ drops to a small value … because there is simply nothing more to fit into the cells … this is the value and the time you need to enter here.
You can only do this using the manufacturer’s data or by testing and observing.
Maybe take a look …
I thought we had been through this, the FAQ is the best advice for the charged voltage, set it to 0.2V below your absorption voltage. Setting it to 13.2V is below your battery voltage so every time it sees low current it syncs to 100%. Read the FAQ and it explains how sync works and why it needs to be higher.
Kinda same help needs here. I am stucked on 13.35-13.4V for 2 days now. SOC says it’s on 100% but the battery came with 14.1V when I installed it into my system and it seems it will never reach again that voltage.
Some screenshots…maybe I just not patient enough or maybe someone will spot what’s the problem.
You mean a charger like blue smart 12/30?
Still don’t understand. Not a single word. Never mind. @Netrange will take a little time to teach me.
Just set it to 14.2V for charged voltage. It will work.
Smart shunt setting, battery setting, charged voltage setting, 13.2V to 14.2V?
Solar charge.
From previous discussion your battery spec had an absorption voltage of 14.4V. You currently have 14.2V because you have chosen the default setting for Victron batteries. Press the expert button then you can increase this to 14.4V.
SmartShunt
Charged Voltage should be 14.2V. This is not per the Victron manual because the setting in Victron manual gets confused by solar charging as explained in the FAQ.
Tail current should be 2% but 4% will work equally well for lithium.
Solar charge, battery setting, absorbstion voltage set to 14.4V 
Done.
Float voltage can stay on 13.5V?
Smart Shunt:
Battery settings, charged voltage: 13.2V to 14.2V Done
Tail current: set to 2% Done
13.5 is a perfectly safe voltage for lithium float. It may allow the battery to discharge a bit, perhaps 90% rather than keeping it totally full. See how it works, if once it goes to float all current comes from the battery and the battery discharges below 90% increase it a bit.
Thank you for your help.
Will read again and again your comments until I will undertand. Because I guess I need to understand what I am doing if I want to keep the system and the battery in healthy state.
Hello I have quite the same problem. I configured the smartshunt with following value:
Charged voltage : 26.3v
Tail current 4%
I have two batteries 12v serially connected so 24v. And total Ah is 360ah.
I understand how the 100% soc is detected by the smartshunt. But after manually configured the SOC at 20%, the SOC is at 100% 5 min later.
Currently in winter I have:
battery voltage = 26.7
Current = 0.8a
So my understanding is that smartshunt think my battery is under float mode. But it is not true because my battery are almost empty. During the sun of winter that is very low, the voltage of empty battery is a 26.6v and the current is also very low.
So the smartshunt set the SOC at 100% because it seems it can’t differentiate absorption mode during winter (low current) and the real float mode when batteries are full.
Is there a way to configure it correctly?
Read this FAQ then set your charged voltage on the shunt to 0.2V below the absorption voltage, something like 28.0 or 28.2V then it will only synchronise when it truly gets to absorption and the battery is full.
Thanks for your answer. Currently my victron mppt is configured like this (24v battery)
float = 27.6 v
absorption = 28.8 v
I will try your configuration but in smartshunt documentation victron said that charged voltage should be 0.2v or 0.3v below the float voltage (that is below the absorption voltage). Is it an error in the victron documentation?
And using the float or absorption voltage do you know how the smartshunt could know that battery is full or not if the current is always low (like in winter…)
Because I could have my battery at 28.8v with a low charge current because of the lack of sun in winter and have my battery that is not filled. Don’t you think ?
The Victron documentation does not cover the edge case of a relatively small solar system compared to battery size. The Victron settings will work if your charging input has enough power to always reach absorption. I think there is a section in the manual in troubleshooting that may cover this but I am not searching it out. Using 0.2V below absorption has worked for me for 5 years on my boat and many others and this forum and many others are full of this advice which works.
Thanks a lot ! It is strange that the float/absorption mode is not sent to the smartshunt through ve direct by the mppt controller / cerbo gx…
Do you know if the SOC information is used by the mppt controller to stop the charge for instance ?
The SmartShunt is only a monitoring function, it does not control anything. The MPPT works off voltage for absorption and float, it does not do anything with SOC.
What the SmartShunt is useful for is sending the actual battery voltage and current (and temperature if measured) to the MPPT via the Cerbo GX so the MPPT is using better information negating the effect of loads or cable voltage drop. To do this you have to enable DVCC on the Cerbo GX and SVS, SCS and possibly STS, share voltage, current and temperature sensing.
From the SmartShunt manual
It is also possible that the battery monitor synchronises too early. This can happen in solar systems or in systems that have fluctuating charge currents. If this is the case change the following settings:
